Vibrio

Beyond Salmonella: Emerging Foodborne Threats

Walkerton, a serene town in Bruce County, Ontario, with a population of under 5,000, embodies tranquil rural charm, where close-knit communities thrive amid picturesque landscapes. Here on May 15, 2000, the local public utilities commission took a routine sample of the water supply and discovered E. coli contamination. The commission didn’t notify public health officials.

In the following days, several people fell ill with bloody diarrhea. The local public utilities commission reassured officials a couple of times that the water supply was safe, even though cases kept rising. By the time health officials finally warned the community against consuming untreated tap water, over 40 individuals had already sought medical attention at the hospital.

The Walkerton E. coli outbreak that saw 2,300 people fall ill, and seven die, was the worst public health disaster involving municipal water in Canadian history.